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 MEMORY:

Memory is an area of a computer that store data and instructions to be accessed by processor as well as

 the results of processing . It consists of one or more chips on motherboard in the computer.


STURUCTURE OF MAIN MEMORY:

The main memory of the computer consists of thousands or millions of cells of storage locations . Each

 cell can store a bit. One bit can represent 0 or 1. BIT stands for binary digit . The memory cells are

 logically  organized into groups of 8 bits known as byte


Memory cells organized as byte:

7

6

5

4

3

2

1

0


Each byte in the memory has a unique number assigned to it. The number is known as the address of

 that  byte . The scheme of arranging the cells into a byte and bytes into memory chip  that is shown .

The number shows the byte number assigned to a byte. It is also known as adress of the byte.

TYPES:

  • RAM
  • ROM

EXPLIAN:

1-      RAM stands for RANDOM ACCESS MEMORY . It is also called DIRECT ACCESS MEMORY.
Random access means that each individual byte in entire memory can be accessed directly . Ram is used to store data and instructions temporarily . A program must be loaded into RAM before execution. 

FURTHER TYPES OF RAM:
  • DRAM
  • SRAM
  • MRAM
2-   ROM stands for READ ONLY MEMORY. The instructions in ROM  prepare the computer for use. 
These instructions can only be read but cannt be changed or deleted . It is not possible to write new information or instruction into the ROM. Rom stores data and instructions permanently . 

FURTHER TYPES OF ROM :
  • PROM
  • EPROM
  • EEPROM

COMPLETE:
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